Hokkaido Study on Environment and Children’s Health
The Hokkaido Study is an ongoing study investigating environmental and genetic influences on health and neurodevelopment from before birth to adulthood. The study consists of two prospective cohorts of mother-child pairs residing in Japan: the Sapporo (Toho hospital) cohort and the Hokkaido (large-scale) cohort. The Sapporo cohort enrolled 514 pregnant women at 23-35 weeks of gestation who planned to deliver at Toho Hospital in Sapporo city between July 2002 and October 2005. The Hokkaido cohort enrolled 20,926 pregnant women before 13 weeks of gestational age who visited one of the associated medical institutions throughout Hokkaido between February 2003 and March 2012.
Study design
Cohort - primary caregiver and child, Cohort - birth
Number of participants at first data collection
514 (Sapporo cohort mother-child pairs)
20,926 (Hokkaido cohort mother-child pairs)
Age at first data collection
Birth (Sapporo cohort children)
Birth (Hokkaido cohort children)
Varied (Sapporo cohort mothers)
Varied (Hokkaido cohort mothers)
Participant year of birth
2002 - 2005 (Sapporo cohort children)
2003 - 2012 (Hokkaido cohort children)
Varied (Sapporo cohort mothers)
Varied (Hokkaido cohort mothers)
Participant sex
All
Representative sample at baseline?
No
Sample features
Country
Year of first data collection
2002 (Sapporo cohort mother-child pairs)
2003 (Hokkaido cohort mother-child pairs)
Primary Institutions
Hokkaido University (北海道大学, Hokkaidō daigaku)
Profile paper DOI
Funders
Japan Agency for Medical Research and Development (AMED)
Japan Society for the Promotion of Science (JSPS)
Ministry of Education, Culture, Sports, Science and Technology (MEXT/Monbusho)
Ministry of Health, Labor and Welfare (厚生労働省, MHLW)
Ministry of Internal Affairs and Communications
Ongoing?
Yes
Data types collected
- Computer, paper or task testing (e.g. cognitive testing, theory of mind doll task, attention computer tasks)
- Interview – face-to-face
- Physical environment assessment (e.g. pollution, mould)
- Physical or biological assessment (e.g. blood, saliva, gait, grip strength, anthropometry)
- Secondary data
- Self-report questionnaire – paper or computer assisted
- None
- Electroencephalography (EEG)
- Medical birth registry
Engagement
Keywords
Consortia and dataset groups
